Groups #3 & #7 - Questions-The Earth

When I was reading/ After reading .... (hyperlink), I wondered...
Write your name under your question or add three ~ (ALT 126)
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gabrielasellart

What causes the pollution? (Macarena Brunelli)

Will the life on the earth dead? (Roman Kremer)

Will the temperature of the earth increase in a great scale in the future? (Juan Torres)